walter



(No Model.)

' J. WALTER.

METAL ROOFING. No. 309,175. Patented Dec. 9, 1884.

m W E M- N PLIERs. Pholo-lithogm hur, whhi um n. c

NITE STATES FFIC JOHN XVALTER, OF NASHVILLE, TENNESSEE, ASSIGNOR TO THENATIONAL SHEET METAL ROOFING COMPANY, OF SAME PLACE.

M ETAL ROOFING.

SPECIFICATION forming part of Letters Patent No. 309,175, dated December9, 1884.

Application filed April 14, 1884. (no model.)

To all whom it may concern Beit known that 1, JOHN WALTER, olNashville,in the county of Davidson and State of Tennessee, have invented acertain new and 5 useful Improvement i 11 Metal Roofing, of which thefollowing is a full, clear, and exact descrip tion, reference being hadto the accompanying drawings.

This invention relates to metal plates for to roofing buildings, andparticularly to the kind of plates shown and described in United StatesPatent No. 256,083, issued to me April 4, 1882; and the improvementconsists in the manner of arranging such plates when laying r 5 themupon a building.

In the drawings, Figure l is a top view of the plates as they appearwhen secured to a building, and Fig. 2 is a section of the same on planea'.

In these views A represents one of the plates; B and 0, two parallelcorrugations near one of its side edges; D, a gutterbetween suchcorrugations; E, a flange by which the plate is nailed to the building;F, a broad 2 corrugation on the opposite side of the plate,

the edge of which is bent inwardly, so as to engage with the corrugationB of an adjacent plate to form a 1001688311], G, between the plates, thecorrugation itself covering the gut- 0 ter I); H, a transversecorrugation near the upper end of the plate,that prevents capillaryaction between the overlapping ends of the plates of adjacent layers I,a centrally-la cated corrugation of a shape like an inverted Y, thatturns the water from the overlapping end of the plate to the sidesthereof, to prevent fiooding the joint between adjacent layers; J anarrow-head corrugation located in the bifurcation of the Y-corrugation,which also serves to guide the water from the lower or overlapping endto the sides, all ofwhich is more fully referred to in said patent. Thesaid patent also described the plates which form any upper layer as solaid in relation to 5 the plates of any adjacent lower layer that thelock-seams uniting the plates coincide or are in the same right linesfrom the lower to the upper layer; but in the present case the platesare combined and arranged in a manner to avail of the advantages of thecommon breakg'oint method. Thus the seams G, that unite the plates ofany upper layer, coincide with and form practically extensions of thecentral corrugations I of the plates of the next lower layer. So, also,the central corrugations J of the plates of any upper layer overlap theseam G between the plates of the next lower layer. By this arrangementof the plates there is but one thickness of metal under or over thelapping parts of the seams be tween the plates, while heretofore theseams themselves overlapped, and hence the plates can be laid closer tothe structure they are to protect, thereby being less subject to theact-ion of wind, accomplishing their purpose more certainly andpresenting a better appearance. The discharge from the gutters in theseams and the flow of water at the sides of the plates are divided anddiverted by each layer of plates, and therefore the water earn not, asheretofore, collect in currents of such volume as to flood the seamsbetween the plates. '1 he central Ycorrugatious, abutting as they doagainst the ends of the seams, tend to protect their open ends andcontained gutters, and the stems of the arrow-head c0rrugations, fittingas they do closely around the seams at their upper ends, more surelyprevent water from getting in such seams than when the seams lie uponone another,

WVhat is claimed as new is 1. The combination of layers of sheet-metalplates A in such manner that the seams Gr between the plates of an upperlayer shall coincide withand form an extension of a central corrugation,I, formed in the plates of the next lower layer, substantially as setforth and JOHN XVALTER.

\Vitnesses:

Boer. T. HOPKINS, II. \V. BUTTERFF.

